Performance slow of Delete query in SQL Server -


i have application using entity framework db operations. in 1 table when performing delete operation takes more 3 minutes. other similar tables doesn't take time. have debugged code , find out there no issue code.but executing query in sql server took time.

any troubleshooting steps/root cause issue ?

my table below,

id (pk,uniqueidentifier,not null) firstvalue(real,not null) secondvalue(real,not null) thirdvalue(real,not null) lastvalue(int,not null) config_id(fk,uniqueidentifier,not null)

query execution plan enter image description here

something isn't adding here, we're not seeing full picture...

there multitude of things can slow down deletes (usually):

  • deleting lot of records (which know isn't case here)
  • many indexes (which suspect case here)
  • deadlocks , blocking (is development or production database?)
  • triggers
  • cascade delete
  • transaction log needing grow
  • many foreign keys check (i suspect might happening)

can please give screenshot of "view dependencies" feature in ssms? this, right click on table in object explorer , select view dependencies.

also, can open query on master database, run following queries , post results:

select name, value, value_in_use, minimum, maximum, [description], is_dynamic, is_advanced sys.configurations (nolock) name in (     'backup compression default',     'clr enabled',     'cost threshold parallelism',     'lightweight pooling',     'max degree of parallelism',     'max server memory',     'optimize ad hoc workloads',     'priority boost',     'remote admin connections' ) order name option (recompile);  select db_name([database_id]) [database name],         [file_id], [name], physical_name, [type_desc], state_desc,        is_percent_growth, growth,        convert(bigint, growth/128.0) [growth in mb],         convert(bigint, size/128.0) [total size in mb] sys.master_files (nolock) order db_name([database_id]), [file_id] option (recompile);

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